| 摘要 |
<p>The rotary seal assembly is used for sealing a rotating shaft, such as the shaft of a centrifugal pump. The assembly has a first sealing element fast on the shaft and d second sealing element arranged non-rotatably but axially movably next to the first element. On that side of the elements towards the pressure fluid which is to be sealed, there is a barrier, and there is an inlet for pressurized service liquid into the annular space between the elements and the barrier. The pressure of the service liquid forces the second element into sealing contact with the first and also provides a liquid barrier separating the elements from the pressure fluid which is being sealed. This feature is useful when abrasive slurries are being pumped, since the slurry is refused access to the elements.</p> |
